The most important feature of all living systems is to

Which of the following cations cannot give the borax bead test?

If we remove half of the forest cover of the Earth,the crisis that will occur is:

When a non-volatile solute is added to a solvent,the vapor pressure decreases by $10 \ mm$. The mole fraction of the solute is $0.2$. If the vapor pressure decreases by $20 \ mm$,what will be the mole fraction of the solvent?

What is the common name of benzene$-1,3-$diol?

In an experiment with $15$ observations on $x$,the following results were available: $\sum x^2 = 2830$ and $\sum x = 170$. One observation that was $20$ was found to be wrong and was replaced by the correct value $30$. Then the corrected variance is: